Release-5.2.0rc1 Builds are failing.

[ckolli5]

Description of the bug:

Release-5.2.0rc1 builds are failing with the following errors:

OpenJDK 11, gcc 7.4.0 - //src/test/shell/bazel/android:aidl_integration_test_with_head_android_tools FAILED TO BUILD

20.04 LTS OpenJDK 11, gcc 9.3.0 - //src/test/shell/bazel/android:android_integration_test_with_head_android_tools FAILED TO BUILD

OpenJDK 11, Xcode - /src/test/java/com/google/devtools/build/android/r8:AllTests   FAILED TO BUILD

OpenJDK 11, VS2017 - //src/test/shell/bazel/android:aidl_integration_test_with_head_android_tools FAILED TO BUILD

18.04 LTS OpenJDK 11, gcc 7.4.0 - //src/test/java/com/google/devtools/build/android/r8:AllTests   FAILED TO BUILD```

These are not failing in the latest Bazel.


### What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.


_No response_

### Which operating system are you running Bazel on?


_No response_

### What is the output of `bazel info release`?


_No response_

### If `bazel info release` returns `development version` or `(@non-git)`, tell us how you built Bazel.


_No response_

### What's the output of `git remote get-url origin; git rev-parse master; git rev-parse HEAD` ?


_No response_

### Have you found anything relevant by searching the web?

_No response_

### Any other information, logs, or outputs that you want to share?

Here is the buildkite log: https://buildkite.com/bazel/bazel-at-head-plus-downstream/builds/2475

[meteorcloudy]

Link to the failed downstream build: https://buildkite.com/bazel/bazel-at-head-plus-downstream/builds/2475

external/desugar_jdk_libs/src/share/classes/java/util/stream/Collectors.java:631: error: [ReturnValueIgnored] Return value of 'sumWithCompensation' must be used
                (a, b) -> { sumWithCompensation(a, b[0]); sumWithCompensation(a, b[1]); a[2] += b[2]; a[3] += b[3]; return a; },
                                                                             ^
    (see https://errorprone.info/bugpattern/ReturnValueIgnored)
  Did you mean '(a, b) -> { sumWithCompensation(a, b[0]);  a[2] += b[2]; a[3] += b[3]; return a; },'?

[meteorcloudy]

@cushon Bazel@HEAD is green when building Bazel itself at the latest commit, but not Bazel 5.2.0 rc1, do you know which change we're missing in the release branch?

[meteorcloudy]

Probably we need to cherry-pick this one: cf57345

@hvadehra Can you please confirm this?

[cushon]

@comius @hvadehra

This is #15219, cherry-picking 9fad5a3 SG

There was some discussion in the other bug about suppressing this locally for the desugar target, which I still think would be a worthwhile follow-up

[meteorcloudy]

There was some discussion in the other bug about suppressing this locally for the desugar target, which I still think would be a worthwhile follow-up

I guess that change is not necessary for the 5.2 release?

[meteorcloudy]

9fad5a3 has been cherry-picked in #15559 to fix the issue in 5.2.0